Quantitative Examination of the Bottlenose Dolphin Cerebellum
Quantitative Examination of the Bottlenose Dolphin Cerebellum
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DOI：
10.1002/ar.22726
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发表时间：
2013-08-01
影响因子：
2
通讯作者：
Ridgway, Sam
中科院分区：
文献类型：
--
作者：
Hanson, Alicia;Grisham, William;Ridgway, Sam
对短吻海豚（Tursiops truncatus）大脑的神经解剖学研究揭示了其在大小和复杂性方面与人类大脑惊人的相似之处。然而，海豚的大脑也包含独特的异速生长关系。与人脑相比，海豚的小脑明显更大。仔细观察后发现，这两个物种的小脑小叶组成是不同的。在这项研究中，我们使用磁共振成像分析小脑解剖在海豚和测量的体积单独的小脑小叶海豚和人类。通过三维建模辅助小叶识别。我们发现，小叶VI，VIIb，VIII和IX是最大的小叶的海豚小脑，而前叶（I-V），EUI，EUI II，和绒球结节叶较小。不同的小叶大小可能有功能上的影响。听觉相关的小叶VIIb，VIII，IX可能是大的海豚由于回声定位能力。我们的研究提供了小脑解剖的定量信息，证实了以前的报告的基础上，肉眼观察和主观分析。这项研究是一个持续努力的一部分，提供明确的描述鲸类神经解剖学，以支持解释鲸类认知的行为研究。Anat Rec，2013. (c)2013 Wiley Periodicals，Inc.
Neuroanatomical research into the brain of the bottlenose dolphin (Tursiops truncatus) has revealed striking similarities with the human brain in terms of size and complexity. However, the dolphin brain also contains unique allometric relationships. When compared to the human brain, the dolphin cerebellum is noticeably larger. Upon closer examination, the lobule composition of the cerebellum is distinct between the two species. In this study, we used magnetic resonance imaging to analyze cerebellar anatomy in the bottlenose dolphin and measure the volume of the separate cerebellar lobules in the bottlenose dolphin and human. Lobule identification was assisted by three-dimensional modeling. We find that lobules VI, VIIb, VIII, and IX are the largest lobules of the bottlenose dolphin cerebellum, while the anterior lobe (I-V), crus I, crus II, and the flocculonodular lobe are smaller. Different lobule sizes may have functional implications. Auditory-associated lobules VIIb, VIII, IX are likely large in the bottlenose dolphin due to echolocation abilities. Our study provides quantitative information on cerebellar anatomy that substantiates previous reports based on gross observation and subjective analysis. This study is part of a continuing effort toward providing explicit descriptions of cetacean neuroanatomy to support the interpretation of behavioral studies on cetacean cognition. Anat Rec, 2013. (c) 2013 Wiley Periodicals, Inc.